What is the cheapest airline that flies from White Plains Westchester County to Lambert-St Louis?

Delta, American Airlines, and Alaska Airlines are the most popular carriers operating from White Plains Westchester County to Lambert-St Louis

What airlines fly to St. Louis?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to St. Louis from White Plains according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?

Prices for flights from White Plains Westchester County Airport to Lambert-St Louis Airport were last updated today.

How many operators does momondo search for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?

The number of operators available for flights from White Plains Westchester County Airport to Lambert-St Louis Airport is 2 as of January 2026.

How old do you have to be to fly from White Plains Westchester County Airport to Lambert-St Louis Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from White Plains Westchester County Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$124 Cheap Flights from White Plains to St. Louis in 2026

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6:00 am - 11:02 am

HPN

STL

6h 02m

1 stop

6:35 am - 11:56 am

STL

HPN

4h 21m

1 stop

$279Delta

Tue, Feb 24 - Sat, Feb 28

5:15 pm - 9:06 pm

HPN

STL

4h 51m

1 stop

6:32 am - 11:44 am

STL

HPN

4h 12m

1 stop

$305Delta

Sat, Apr 11 - Mon, Apr 13

6:00 am - 11:09 am

HPN

STL

6h 09m

1 stop

6:32 am - 11:53 am

STL

HPN

4h 21m

1 stop

$331Delta

Sun, Mar 8 - Mon, Mar 23

1:37 pm - 7:30 pm

HPN

STL

6h 53m

1 stop

6:00 am - 2:30 pm

STL

HPN

7h 30m

1 stop

$358American Airlines

Sat, Mar 14 - Mon, Mar 16

4:29 pm - 11:36 pm

HPN

STL

8h 07m

1 stop

6:35 am - 11:56 am

STL

HPN

4h 21m

1 stop

$369Delta

Fri, Feb 20 - Mon, Feb 23

5:20 pm - 8:42 pm

HPN

STL

4h 22m

1 stop

6:00 am - 12:02 pm

STL

HPN

5h 02m

1 stop

$384Delta

Fri, Apr 17 - Sun, Apr 19

12:38 pm - 4:37 pm

HPN

STL

4h 59m

1 stop

6:35 am - 11:56 am

STL

HPN

4h 21m

1 stop

$401Delta

Sun, Feb 8 - Sat, Feb 21

1:37 pm - 6:07 pm

HPN

STL

5h 30m

1 stop

10:37 am - 3:59 pm

STL

HPN

4h 22m

1 stop

$412American Airlines

Thu, Feb 12 - Mon, Feb 16

5:29 pm - 9:23 pm

HPN

STL

4h 54m

1 stop

7:15 am - 3:48 pm

STL

HPN

7h 33m

1 stop

$414American Airlines

Sat, May 23 - Mon, May 25

12:38 pm - 4:37 pm

HPN

STL

4h 59m

1 stop

6:35 am - 11:56 am

STL

HPN

4h 21m

1 stop

$423Delta

Sun, Feb 8 - Sun, Feb 22

American Airlines flights from White Plains to St. Louis

Our best American Airlines deals on White Plains to St. Louis flight tickets

American Airlines

Mar 14

HPN1:37 pmWhite Plains Westchester County

6h 53m

1 stop

STL7:30 pmLambert-St Louis

Mar 16

STL6:00 amLambert-St Louis

7h 30m

1 stop

HPN2:30 pmWhite Plains Westchester County

$358

American Airlines

Feb 12

HPN1:37 pmWhite Plains Westchester County

5h 30m

1 stop

STL6:07 pmLambert-St Louis

Feb 16

STL10:37 amLambert-St Louis

4h 22m

1 stop

HPN3:59 pmWhite Plains Westchester County

$412

American Airlines

May 23

HPN5:29 pmWhite Plains Westchester County

4h 54m

1 stop

STL9:23 pmLambert-St Louis

May 25

STL7:15 amLambert-St Louis

7h 33m

1 stop

HPN3:48 pmWhite Plains Westchester County

$414

Delta flights from White Plains to St. Louis

Our best Delta deals on White Plains to St. Louis flight tickets

Delta

Feb 24

HPN6:00 amWhite Plains Westchester County

6h 02m

1 stop

STL11:02 amLambert-St Louis

Feb 28

STL6:35 amLambert-St Louis

4h 21m

1 stop

HPN11:56 amWhite Plains Westchester County

$279

Delta

Apr 11

HPN5:15 pmWhite Plains Westchester County

4h 51m

1 stop

STL9:06 pmLambert-St Louis

Apr 13

STL6:32 amLambert-St Louis

4h 12m

1 stop

HPN11:44 amWhite Plains Westchester County

$305

Delta

Mar 8

HPN6:00 amWhite Plains Westchester County

6h 09m

1 stop

STL11:09 amLambert-St Louis

Mar 23

STL6:32 amLambert-St Louis

4h 21m

1 stop

HPN11:53 amWhite Plains Westchester County

$331

Fly from

Fly to

Route

Depart

Return

Price

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Tue 2/24

6:00 am-11:02 am

1 stop6h 02m

Lambert-St Louis

Sat 2/28

6:35 am-11:56 am

1 stop4h 21m

$279

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sat 4/11

5:15 pm-9:06 pm

1 stop4h 51m

Lambert-St Louis

Mon 4/13

6:32 am-11:44 am

1 stop4h 12m

$305

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sun 3/8

6:00 am-11:09 am

1 stop6h 09m

Lambert-St Louis

Mon 3/23

6:32 am-11:53 am

1 stop4h 21m

$331

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sat 3/14

1:37 pm-7:30 pm

1 stop6h 53m

Lambert-St Louis

Mon 3/16

6:00 am-2:30 pm

1 stop7h 30m

$358

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Fri 2/20

4:29 pm-11:36 pm

1 stop8h 07m

Lambert-St Louis

Mon 2/23

6:35 am-11:56 am

1 stop4h 21m

$369

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Fri 4/17

5:20 pm-8:42 pm

1 stop4h 22m

Lambert-St Louis

Sun 4/19

6:00 am-12:02 pm

1 stop5h 02m

$384

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sun 2/8

12:38 pm-4:37 pm

1 stop4h 59m

Lambert-St Louis

Sat 2/21

6:35 am-11:56 am

1 stop4h 21m

$401

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Thu 2/12

1:37 pm-6:07 pm

1 stop5h 30m

Lambert-St Louis

Mon 2/16

10:37 am-3:59 pm

1 stop4h 22m

$412

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sat 5/23

5:29 pm-9:23 pm

1 stop4h 54m

Lambert-St Louis

Mon 5/25

7:15 am-3:48 pm

1 stop7h 33m

$414

White PlainsSt. Louis

HPN - STL

HPNSTL

White Plains Westchester County

Sun 2/8

12:38 pm-4:37 pm

1 stop4h 59m

Lambert-St Louis

Sun 2/22

6:35 am-11:56 am

1 stop4h 21m

$423

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from White Plains to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from White Plains to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $324. The month of December is another great option to travel to St. Louis, with average flight prices from White Plains averaging around $324.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $314. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $441. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from White Plains in the morning is the least expensive time of day to depart. momondo users have found prices as low as $343 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $370 per ticket.

When to book flights from White Plains to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from White Plains to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap White Plains to St. Louis (HPN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from White Plains to St. Louis

Fastest flight time	4h 51m
Direct flights	None

The fastest flight from White Plains to St. Louis takes 4h 51m

There are no direct flights from White Plains to St. Louis. There are no popular flight routes from White Plains to St. Louis.

Search flight deals

How far is White Plains Westchester County to Lambert-St Louis by plane?
Lambert-St Louis is 885.7 mi away from White Plains Westchester County. A reasonable flight in good conditions will take 4h 51m.
When did momondo last update prices for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?
Prices for flights from White Plains Westchester County Airport to Lambert-St Louis Airport were last updated today.
How many operators does momondo search for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?
The number of operators available for flights from White Plains Westchester County Airport to Lambert-St Louis Airport is 2 as of January 2026.
How old do you have to be to fly from White Plains Westchester County Airport to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from White Plains Westchester County Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from White Plains to St. Louis?
momondo data reveals that the most frequently booked airline on the route from White Plains to St. Louis is American Airlines, representing 64% of all bookings. The subsequent popular airline is Delta at 36%.

Best airlines flying from White Plains to St. Louis

Compare and see reviews for airlines that fly from White Plains to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $260	Free Cancellation	Rating 7.9 8,111 reviews		Search Delta flights
American Airlines	PriceFrom $280	Free Cancellation	Rating 7.2 11,189 reviews		Search American Airlines flights

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Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Eureka

Edwardsville

Festus

Glencoe

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from White Plains to St. Louis?

Finding the right flight to St. Louis from White Plains is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from White Plains to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for White Plains to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from White Plains to St. Louis?

Once you have performed a search for White Plains to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from White Plains to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from White Plains and alert you when they change.

An easier way to manage your St. Louis trip

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Cheap flights from White Plains to St. Louis from $124

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from White Plains to St. Louis departing on 2/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from White Plains to St. Louis

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How to get the cheapest flight ticket from White Plains to St. Louis

What is the cheapest month to fly to St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

What is the cheapest airline that flies from White Plains Westchester County to Lambert-St Louis?

Delta, American Airlines, and Alaska Airlines are the most popular carriers operating from White Plains Westchester County to Lambert-St Louis

What airlines fly to St. Louis?

When to book flights from White Plains to St. Louis

Cheap White Plains to St. Louis (HPN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from White Plains to St. Louis

Fastest flight time

Direct flights

How far is White Plains Westchester County to Lambert-St Louis by plane?

When did momondo last update prices for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?

How many operators does momondo search for flights from White Plains Westchester County Airport to Lambert-St Louis Airport?

How old do you have to be to fly from White Plains Westchester County Airport to Lambert-St Louis Airport?

What documentation or ID do you need to fly to Lambert-St Louis Airport?

What is the most popular airline from White Plains to St. Louis?

Best airlines flying from White Plains to St. Louis

Compare and see reviews for airlines that fly from White Plains to St. Louis with momondo

Traveling to a place near St. Louis?

Why use momondo?

Why should I use momondo to find a flight deal from White Plains to St. Louis?

Can I find flights from White Plains to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from White Plains to St. Louis?

I’m not ready to book a flight from White Plains to St. Louis right now. Can momondo alert me if prices change?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Missouri